Quantitative Aptitude - Arithmetic Ability Questions

What least value must be assigned to '*' so that the number 63576 * 2 is divisible by 8?

Karan, Arjun, Preeti, Priya and Ashish are travelling in a car. Three years ago, the average age of Arjun, Preeti and Priya was 42 years. If the present age of Karan is 65 years and the present average age of all five is 50 years, then what is the present age of Ashish?

In the following question, select the odd number from the given alternatives.

If a2+b2+c2=14 and a+b+c=6, then the value of ab+bc+ca is,

A fan is sold at a discount of 37.5%. If the marked price of the fan is Rs 7200, then what is the selling price (in Rs) of the fan?

X and Y give an exam. Difference of their marks is 45 and the difference of their marks is 15% of the maximum marks. What is the maximum marks for the exam?

In the question, two equations I and II are given. You have to solve both the equations and give answer

$$\begin{gathered} x2-11x+28=0 \\ y2-18y+81=0 \end{gathered}$$

If x + 1/x = √13, then 3x(x2-1) equal to